Also DOS-to-Unixify BamReader.h endlines and remove an extra set of
parens in bamtools.cpp

Also initiate README.md for this fork

…onary

With my addition of BamReader::GetConstSamHeader(), the operator[] method for querying SamSequenceDictionary no longer worked as it couldn't handle a const this.  Since it had a default not-found behavior of adding the query name, I think these Find() iterator-based methods, as parallels to the find() methods of map containers are better with read-only access.  The End() iterator is returned if sequenceName is not found.

Conflicts:
	CMakeLists.txt
	src/api/BamReader.h